PLoS One
http://www.plosone.org/
[Accessed 19 Mar 2022]

Research Article
Use of oral polio vaccine and the incidence of COVID-19 in the world
Farrokh Habibzadeh, Konstantin Chumakov, Mohammad M. Sajadi, Mahboobeh Yadollahie, Kristen Stafford, Ashraf Simi, Shyamasundaran Kottilil, Iman Hafizi-Rastani, Robert C. Gallo
Research Article | published 17 Mar 2022 PLOS ONE
https://doi.org/10.1371/journal.pone.0265562